AbstractThe present study examines the measurement property of instructional quality in mathematics education, building on data from teachers and students, by combing TALIS 2013 and PISA 2012 linkage data from seven countries. Confirmatory factor analysis was applied to examine the dimensionality of the construct instructional quality in mathematics instruction. Three dimensions were identified (i.e., classroom disciplinary climate, teacher support, and cognitive activation) when building on teacher data from TALIS. This three-dimensional model did not fit all countries. When analyzing PISA data, the same three dimensions could be identified, but two additional dimensions appeared: classroom management and student-orientated instruction. This five-dimensional factor structure reflected metric invariance across all countries. The findings imply that students and teachers seem to hold different perceptions about mathematics instructional quality reflect different dimensions. These differences seem to vary within and between countries. This implies that care should be taken when using the construct as an equivalent measure of instructional quality when studying school effectiveness in mathematics education across countries.